Re: [dbound] [DNSOP] Related Domains By DNS (RDBD) Draft

Stephen Farrell <stephen.farrell@cs.tcd.ie> Wed, 27 February 2019 16:14 UTC

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To: Paul Wouters <paul@nohats.ca>, "Brotman, Alexander" <Alexander_Brotman@comcast.com>
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From: Stephen Farrell <stephen.farrell@cs.tcd.ie>
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Date: Wed, 27 Feb 2019 16:14:46 +0000
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Subject: Re: [dbound] [DNSOP] Related Domains By DNS (RDBD) Draft
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Hiya,

On 27/02/2019 15:54, Paul Wouters wrote:
> How is this data being consumed by the enduser ? 

Very good question. Sorry for what's likely a longer
answer than you want:-)

Alex and I chatted about that and I think ended up
figuring: a) there are many potential semantics that
could be associated with such a linkage, b) we don't
yet know what'd be useful, but c) no, we are defo
not trying for an EV-like thing and lastly d) we really
want to keep this as simple as possible - given there's
a lot of feature-creep potential here, and that'd likely
be fatal.

My own use-case for this relates more to surveys, where
I'd like to get a hint that two names are related so I
could take that into account. Alex's is more business
like (as you'd expect:-) he'd like to be able to feed
this kind of linkage information into mail processing,
e.g. perhaps to treat some mails as less-likely spam if
he sees a link, compared to if he doesn't (with all the
other mail processing foo that'd clearly be required to
not do that kind of thing stupidly of course). We guess
that there'd be other uses too but finding out if this
is seen as useful enough that people would publish RR's
is part of why we shot out the draft now.

We also considered whether or not to e.g. try to add
some kind of flag to indicate semantics but reckoned we
don't know enough to do that for now.

Cheers,
S.

> It sort of begins
> to look like an EV thing. Also, wouldn't attackers just link their
> fake domain to another fake domain to get a green looking OKAY?